Although the only audio shows I have attended have been in London, I have never come back to my own system with a feeling of disappointment. I may have listened to vastly more expensive, and possibly superior gear, the size of the demonstration rooms are often acoustically quite different to my listening room.

Because of that I no longer attend audio shows - I am happy with what I have and am unlikely now to upgrade.

BTW I'm still using my 50 year old original and unmolested Quad 57 ESLs.